Dosing Pump vs Metering Pump
In US English the usual name is metering pump. In Europe and the Middle East, dosing pump is just as common. On this site the category is one list.
The difference that matters
The useful split is the drive: solenoid, motor diaphragm, hydraulic diaphragm, plunger, or digital. It is not two product families. Open the type pages from the pump category.